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l ,GAYLoRDv. HARPER, or BA-cavia; NEW wenn.

MacJams FOR MESSING .rime-Ks.

Specification of Letters Patent No. 711, dated April 25, 18381.

To all whom it may concern Be it known that I, GAYLORD V. HARPER, of Batavia, in the county of Genesee and State of New York, have invented a new and useful Improvement in' Machines for Making and Discharging Brick, which is described as follows, reference being had to the annexed drawing ofthe same,- making part of this specification.

The frame of this machine may be varied according to circumstances; one now in operation is square, and is made to operate upon four sets of molds; each of which may be made to make from one to four bricks as may be required. The frame A,

Figure 1, however may be made with four, siX, eight or more sides and a correspondinnumber of molds may be used.

he manner which I have adopted in building this machine is as follows ;-first I frame large timbers together, which I shall denominate mud sills for the posts of the machine to rest upon these posts may be mortised into the sills at the bottom and into the frame at the top in the most permanent manner; they should be about three feet long so that the machine may stand at a convenient height to be easily managed by the tenders.

In the frame that is supported by the posts are contained the molds B, B, B, B, in which the bricks are pressed which is done in a horizontal manner by the power of one or more horses, which are attached to a sweep C and moving around in a circle turn a vertical shaft D, in which there is formed a crank E, from which crank shaft the requisite motion and power is obtained by passing the crank Vthrough a wheel or stock F to which are attached in the most convenient manner by means of rods R a number of pistons G corresponding with the number of molds to be operated upon-these pistons are made to move toward and from the center by giving to the shaft such form as will give an eccentric, crank, or cam motion to the wheel .or stock to which the pistons are attached equal to the distancethat these pistons are required to move in order to produce the pressing requisite, which lis about one inch and a half; consequently this wheel or stockis made to move by the oper- Yation of the vertical crank shaft one inch thereby giving the requisite motion to each of the pistons: producing the necessary pressure -The end of the pistons are exactly the size of one side of the brick and fills the top of the mold; the bottom is formed by the frame at V. Beneath each mold is a vertical discharger H Fig.` 2 which forms one side of the mold and is so arranged that formin an inclined plane I operating upon the en of a lever or treadle K, at every revolution of the vertical shaft the other end of said lever being extended to the bottom of the discharger upon which it rests and the lever or treadle being operated upon by the inclined plane will raise the discharger the requireddistance for discharging the brick. A friction roller Wis placed in the lower end of the discharger for the end of the lever to press against in raising it.

To form the opposite side of the mold from that formed by the discharger and for better confining the clay in the mold there is a slide L, that is made to cover the mold as soon as the-clay is admitted, so that none shall escape or raise up during the operation of pressing, this slide may be operated upon in being drawn in and out by the operative parts of the machinery or by the attendants as may be thought best.

In order to confine the pistons in the molds and'have them move accurately there is formed a tenon T on each end of the piston that moves ina groove in the corre-f and to which the pistons are attached to perform an eccentric movement which causes The invention claimed and'desired to be the pistons to be pushed from and drawn tosecured kby Letters Patent consists in .10 vWard the center of the Wheels in succession The mode of pressing and discharging the thus pressing the brick in the moldsone bricks as before described in combination.

after the other. Before the inclined plane Y GAYLORD V. HARPER. or cam I acts upon the dischargers the slides I Witnesses: Y L must be Withdrawn to allow the brick to AANsoN BAKER,

be discharged. ELISHA BAKER. 

